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d2 and Clinical Applications, 3rd Edition (Buckingham, 2019),
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d2 Chapter 1-15 | All Chapters Covered || complete A+ Guide
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ACHIEVERS ZONE STUVIA
,TABLE OF CONTENT
Chapter 1: Nucleic Acids and Proteins
Chapter 2: Gene Expression and Epigenetics
Chapter 3: Nucleic Acid Extraction Methods
Chapter 4: Resolution and Detection of Nucleic Acids
Chapter 5: Analysis and Characterization of Nucleic Acids and Proteins
Chapter 6: Nucleic Acid Amplification
Chapter 7: Chromosomal Structure and Chromosomal Mutations
Chapter 8: Gene Mutations
Chapter 9: DNA Sequencing
Chapter 10: DNA Polymorphism and Human Identification
Chapter 11: Detection and Identification of Microorganisms
Chapter 12: Molecular Detection of Inherited Diseases
Chapter 13: Molecular Oncology
Chapter 14: DNA-Based Tissue Typing (HLA Typing)
Chapter 15: Quality Assurance and Quality Control in the Molecular Laboratory
,Test Bank for Chapter:1 Nucleic Acids and Proteins
Source: Buckingham, L. (2019). Molecular Diagnostics: Fundamentals, Methods, and
Clinical Applications (3rd ed.)
Multiple Choice Questions (30 Questions)
1. Which nitrogenous base is found exclusively in RNA and replaces thymine found in
DNA?
a) Adenine
b) Guanine
c) Cytosine
d) Uracil
Answer: d) Uracil
Explanation: Uracil is present in RNA instead of thymine. It pairs with adenine during
transcription. This difference is critical for distinguishing RNA from DNA in diagnostic
assays and for RNA stability/function.
2. The backbone of a DNA strand consists of alternating:
a) Bases and sugars
b) Phosphates and bases
c) Sugars and phosphates
d) Nitrogenous bases and hydrogen bonds
, Answer: c) Sugars and phosphates
*Explanation: The sugar-phosphate backbone is formed by phosphodiester bonds
between the 3' carbon of one deoxyribose and the 5' carbon of the next. This structure
provides stability and directionality (5'→3') essential for replication and transcription.*
3. Which type of RNA carries amino acids to the ribosome during protein synthesis?
a) mRNA
b) rRNA
c) tRNA
d) snRNA
Answer: c) tRNA
*Explanation: Transfer RNA (tRNA) has an anticodon that base-pairs with mRNA codons
and carries a specific amino acid at its 3' end. This adaptor function is fundamental to
translation accuracy in diagnostic protein analysis.*
4. The primary structure of a protein refers to its:
a) Three-dimensional folded shape
b) Alpha helix and beta sheet arrangements
c) Linear sequence of amino acids
d) Subunit assembly pattern
Answer: c) Linear sequence of amino acids
Explanation: Primary structure is the covalent backbone of amino acids linked by peptide
bonds. This sequence determines higher-order folding and is directly encoded by genes,
making it targetable by DNA sequencing in molecular diagnostics.